While playing around building icons I decided to try to base some forms on Fibonacci circles. Each circle was built in pixel units. It was quite a painstaking process and probably ended up being somewhat arbitrary, but in theory this heart shape should be perfect.
I don't recommend using this method to build an entire icon set unless you want to end up pulling most of your hair out.
(The lower image is an enlargment so some of the exactness may have been lost during scaling)
keyboard shortcuts: ← previous shot → next shot L or F like Z toggle zoom